WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
It's hard to read all the labels and, obviously, you have to allow for 2 channels.
The EZ80 and EZ81 are rectifiers. The EF86 is a small signal pentode. The ECC83/12AX7 is a twin triode.
The ECC88, AKA 6DJ8, is a very popular twin triode. Several designs are available for phono preamps that use the type. However, Mullard made ECC88s are valuable and the best thing to do might be selling them off to fund the project.
Do you possess 2X ECL82s or, even better, 4X ECL82s? Nice, LOW power, amps can be built around the type. Very sensitive speakers are a MUST in combination with "flea" power.
Like ECC88s, Mullard made ECC83s are quite valuable. The ECC83/12AX7 has wide application, especially phono.
The ECL86, AKA 6GW8, is a nice tube, but getting scarce. You could build a quite decent singled ended, low power, amp around the 2 bottles. Before you go that route, make sure you acquire at least 1 set of spares. Tubes are consumable and require periodic replacement. A look at the 6GW8 data sheet suggests you would get approx. 3.5 WPC. The EZ81 would do very nicely in the B+ supply for that amp. You need appropriate, high sensitivity, speakers.
2xECL86 - EZ81 - EMM801 (dual/stereo magic eye) was my very first tube amp. See attachment. Delivering over 4W to some SABA Greencones. Sound was lovely. Absolutely basic schematic with operating conditions according to the datasheet (250V, 36mA, 7K-OPT). But after listening more to Rock and less Classic (Went to a Popa Chubby concert), I needed more power and built other amplifiers.
But, remember, the most expensive part are the transformers. Often it's not really useful to start a project with some tubes you found in your attic.